Iso 8586 2 2008 en FR PDF [PDF]

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INTERNATIONAL STANDARD



ISO 8586-2 Second edition 2008-06-01



Sensory analysis — General guidance for the selection, training and monitoring of assessors — Part 2: Expert sensory assessors Analyse sensorielle — Lignes directrices générales pour la sélection, l'entraînement et le contrôle des sujets — Partie 2: Sujets experts sensoriels



Reference number ISO 8586-2:2008(E)



© ISO 2008



This preview is downloaded from www.sis.se. Buy the entire standard via https://www.sis.se/std-909851



ISO 8586-2:2008(E)



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COPYRIGHT PROTECTED DOCUMENT © ISO 2008 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56 • CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland



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© ISO 2008 – All rights reserved



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ISO 8586-2:2008(E)



Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 8586-2 was prepared by Technical Committee ISO/TC 34, Food products, Subcommittee SC 12, Sensory analysis. This second edition cancels and replaces the first edition (ISO 8586-2:1994), which has been technically revised. ISO 8586 consists of the following parts, under the general title Sensory analysis — General guidance for the selection, training and monitoring of assessors: ⎯



Part 1: Selected assessors



⎯



Part 2: Expert sensory assessors



© ISO 2008 – All rights reserved



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ISO 8586-2:2008(E)



Introduction Sensory assessment may be made by “assessors” (ISO 5492:2008, 1.5), “selected assessors” (ISO 5492:2008, 1.6) and “expert sensory assessors” (ISO 5492:2008, 1.8). ISO 8586-1 specifies requirements for the selection, training and monitoring of selected assessors. This part of ISO 8586 covers the principles linked to selection, training and monitoring performance of expert sensory assessors. This part of ISO 8586 does not deal with product experts or product-specialized experts, because their specific know-how does not lie within sensory competence. However, a product expert or a productspecialized expert who is trained as an expert sensory assessor can be considered as an expert sensory assessor. This product-specialized expert can draw on additional knowledge gained in other fields, such as knowledge of the product to be assessed, and process or marketing experience, in order to interpret sensory data and make deductions. An expert sensory assessor will have demonstrated particular acuity and reproducibility in panel work, and will have developed a good long-term sensory memory, allowing reliable comparative judgements, when necessary, in the absence of control samples. Expert sensory assessors work as a panel which is managed by a panel leader. This panel leader is responsible for the general monitoring of the group of expert sensory assessors and for their training. The expert sensory assessors are not responsible for the choice of tests used, the presentation of the samples or for the interpretation of results. These matters are the responsibility of the panel leader who also decides how much information is given to the panel.



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INTERNATIONAL STANDARD



ISO 8586-2:2008(E)



Sensory analysis — General guidance for the selection, training and monitoring of assessors — Part 2: Expert sensory assessors 1



Scope



This part of ISO 8586 specifies criteria for choosing people with particular sensory skills from selected assessors or from product, process or marketing specialists who themselves satisfy the selection criteria specified in ISO 8586-1. It specifies principles and procedures for choosing them and expanding their knowledge and abilities to the levels required of expert sensory assessors. This part of ISO 8586 sets out requirements for expert sensory assessors to establish sensory profiles of products and materials through the use of descriptors. Specific knowledge of products or materials by expert sensory assessors is not necessary to fulfil these requirements. This part of ISO 8586 supplements the information given in ISO 6658.



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Normative references



The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 5492:2008, Sensory analysis — Vocabulary ISO 5725 (all parts), Accuracy (trueness and precision) of measurement methods and results ISO 8586-1, Sensory analysis — General guidance for the selection, training and monitoring of assessors — Part 1: Selected assessors



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Terms and definitions



For the purposes of this document, the terms and definitions given in ISO 5492:2008 and the following apply. 3.1 sensory assessor any person taking part in a sensory test [ISO 5492:2008, 1.5] 3.2 selected assessor assessor chosen for his/her ability to perform a sensory test [ISO 5492:2008, 1.6]



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ISO 8586-2:2008(E)



3.3 expert sensory assessor selected assessor with a demonstrated sensory sensitivity and with considerable training and experience in sensory testing, who is able to make consistent and repeatable sensory assessments of various products [ISO 5492:2008, 1.8] 3.4 reproducibility precision under reproducibility conditions NOTE



Reproducibility can be expressed quantitatively in terms of the dispersion characteristics of the results.



[ISO 3534-2:2006, 3.3.10] 3.5 reproducibility conditions observation conditions where independent test/measurement results are obtained with the same method on identical test/measurement items in different test or measurement facilities with different operators using different equipment [ISO 3534-2:2006, 3.3.11] NOTE



Reproducibility conditions may include different times (sessions), different environments, and different panels.



3.6 repeatability precision under repeatability conditions NOTE



Repeatability can be expressed quantitatively in terms of the dispersion characteristics of the results.



[ISO 3534-2:2006, 3.3.5] 3.7 repeatability conditions observation conditions where independent test/measurement results are obtained with the same method on identical test/measurement items in the same test or measuring facility by the same operator using the same equipment within short intervals of time [ISO 3534-2:2006, 3.3.6] NOTE



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Repeatability conditions mean same assessors (panel), same time (session), and same environment.



Selection of expert sensory assessors General



Candidates for training shall: a)



already have shown aptitude for sensory analysis, as confirmed by reference to ISO 8586-1 — the best first step is to choose selected assessors or to select people who are already selected assessors;



b)



be motivated by an interest in further developing their sensory skills, in both the sensory methodology and the sensory properties of one or several products;



c)



be available for training and regular practice — a preliminary condition for expert sensory assessors is the regular attendance at panel training programmes;



d)



be volunteers.



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